appearance potential
Also found in: Acronyms.
appearance potential
[ə′pir·əns pə′ten·chəl] (physics)
The minimal potential which the electron beam in the ion source of a mass spectrometer must traverse in order to acquire enough energy to produce ions of a specified nuclide or molecular fragment.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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